Update all non-major dependencies

[benjaminjonard]

This PR contains the following updates:

Package	Type	Update	Change
rector/rector (source)	require-dev	patch	0.19.6 -> 0.19.8
symfony/flex	require	patch	2.4.3 -> 2.4.4

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Release Notes

rectorphp/rector (rector/rector)

### [`v0.19.8`](https://togithub.com/rectorphp/rector/compare/0.19.7...0.19.8) [Compare Source](https://togithub.com/rectorphp/rector/compare/0.19.7...0.19.8) ### [`v0.19.7`](https://togithub.com/rectorphp/rector/releases/tag/0.19.7): Released Rector 0.19.7 [Compare Source](https://togithub.com/rectorphp/rector/compare/0.19.6...0.19.7) #### Bugfixes :bug: - \[TypeDeclaration] Skip assign in construct with method call property same name on RestoreDefaultNullToNullableTypePropertyRector ([#​5556](https://togithub.com/rectorphp/rector-src/pull/5556)) - \[Privatization] Fix reprint with attribute on FinalizeTestCaseClassRector ([#​5557](https://togithub.com/rectorphp/rector-src/pull/5557)) - \[DX] Fix missing Rector\RectorGenerator\Exception\ConfigurationException ([#​5558](https://togithub.com/rectorphp/rector-src/pull/5558)) - Fix platform version resolution, use require first ([#​5555](https://togithub.com/rectorphp/rector-src/pull/5555)) - bump template version (https://github.com/rectorphp/rector-src/commit/02a088c735b9b829c8f0dec445e71dea70e559bc)

symfony/flex (symfony/flex)

### [`v2.4.4`](https://togithub.com/symfony/flex/compare/v2.4.3...v2.4.4) [Compare Source](https://togithub.com/symfony/flex/compare/v2.4.3...v2.4.4)

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